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The arithmetic mean and the standard deviation of a series of 20 items cms.and 5 cms. respectively. but while calculating them , an item 13 missread as 30.

find the correct mean and correct standard deviation?


Four minus five i think that way
0 0 0
sorry what did u say 
im sorry to say. plz dont earn the points like this. its so bad u dint give me the answer of ma question. if u dont know its ok but plzz dont write anyyhing or earn points 
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